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https://www.readbyqxmd.com/read/28812203/assessment-of-methodologies-to-calculate-intraventricular-pressure-differences-in-computational-models-and-patients
#1
Francisco J Londono-Hoyos, Abigail Swillens, Joris Van Cauwenberge, Brett Meyers, Maheswara Reddy Koppula, Pavlos Vlachos, Julio A Chirinos, Patrick Segers
Intraventricular pressure differences (IVPDs) govern left ventricular (LV) efficient filling and are a significant determinant of LV diastolic function. Our primary aim is to assess the performance of available methods (color M-mode (CMM) and 1D/2D MRI-based methods) to determine IVPDs from intracardiac flow measurements. Performance of three methods to calculate IVPDs was first investigated via an LV computational fluid dynamics (CFD) model. CFD velocity data were derived along a modifiable scan line, mimicking ultrasound/MRI acquisition of 1D (IVPDCMM/IVPD1D MRI) and 2D (IVPD2D MRI) velocity-based IVPD information...
August 16, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28803456/evaluation-of-prenatal-corticosteroid-use-in-spontaneous-preterm-labor-in-the-brazilian-multicenter-study-on-preterm-birth-emip
#2
Tabata Z Dias, Renato Passini, Ricardo P Tedesco, Giuliane J Lajos, Patricia M Rehder, Marcelo L Nomura, Maria L Costa, Paulo F Oliveira, Maria H Sousa, Jose G Cecatti
OBJECTIVE: To evaluate prenatal corticosteroid use in women experiencing spontaneous preterm labor and preterm delivery. METHODS: The present cross-sectional multicenter study analyzed interview data from patients attending 20 hospitals in Brazil owing to preterm delivery between April 1, 2011, and September 30, 2012. Patients were stratified based on preterm labor occurring before 34 weeks or at 34-36(+6) weeks of pregnancy, and the frequency of prenatal corticosteroid use at admission was compared...
August 13, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28801038/qrs-duration-reflects-underlying-changes-in-conduction-velocity-during-increased-intraventricular-pressure-and-heart-failure
#3
REVIEW
Jorge G Quintanilla, Javier Moreno, Tamara Archondo, José Manuel Alfonso-Almazán, José María Lillo-Castellano, Elena Usandizaga, María Jesús García-Torrent, Cruz Rodríguez-Bobada, Pablo González, Luis Borrego, Victoria Cañadas-Godoy, Juan J González-Ferrer, Nicasio Pérez-Castellano, Julián Pérez-Villacastín, David Filgueiras-Rama
Pressure overload and heart failure electrophysiological remodeling (HF-ER) in pigs are associated with decreased conduction velocity (CV) and dispersion of repolarization, which lead to higher risk of ventricular arrhythmia. This work aimed to establish the correlation between QRS complex duration and underlying changes in CV during increased intraventricular pressure (IVP) and/or HF-ER ex-vivo, and to determine whether QRS duration could be sensitive to an acute increase in left ventricular afterload in-vivo...
August 8, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28800300/intraventricular-vector-flow-mapping-a-doppler-based-regularized-problem-with-automatic-model-selection
#4
Kondo Claude Assi, Etienne Gay, Christophe Chnafa, Simon Mendez, Franck Nicoud, Juan F P J Abascal, Pierre Lantelme, François Tournoux, Damien Garcia
We propose a regularized least-squares method for reconstructing 2D velocity vector fields within the left ventricular cavity from single-view color Doppler echocardiographic images. Vector flow mapping is formulated as a quadratic optimization problem based on an [Formula: see text]-norm minimization of a cost function composed of a Doppler data-fidelity term and a regularizer. The latter contains three physically interpretable expressions related to 2D mass conservation, Dirichlet boundary conditions, and smoothness...
August 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28799879/the-pathophysiology-of-chronic-noncommunicating-hydrocephalus-lessons-from-continuous-intracranial-pressure-monitoring-and-ventricular-infusion-testing
#5
Per Kristian Eide
OBJECTIVE The pathophysiology of chronic noncommunicating hydrocephalus (ncHC) is poorly understood. This present study explored whether lessons about the pathophysiology of this clinical entity might be retrieved from results of overnight monitoring of pulsatile and static intracranial pressure (ICP) and ventricular infusion testing. METHODS The study cohort included adult patients (> 20 years of age) with chronic ncHC due to aqueductal stenosis in whom symptoms had lasted a minimum of 6 months. A reference cohort consisted of age- and sex-matched patients managed for communicating HC (cHC)...
August 11, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28799178/retrospective-cohort-study-shows-that-the-risks-for-retinopathy-of-prematurity-included-birth-age-and-weight-medical-conditions-and-treatment
#6
Aliaa Adel Ali, Nancy Gomaa, Ahmed Reda Awadein, Huda Hussein Al-Hayouti, Ahmed Hegazy
AIM: This study described the characteristics and risk factors of neonates who developed retinopathy of prematurity (ROP) and severe treatable ROP in two Egyptian neonatal intensive care units (NICUs). METHODS: This retrospective cohort study comprised 108 preterm neonates who were screened for ROP after being admitted to the two NICUs run by Cairo University Hospital from June 2014 to May 2015. Patients were examined using digital fundus photography and indirect ophthalmoscopy was performed if ROP was detected...
August 11, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28798218/imaging-biomarkers-for-adult-medulloblastomas-genetic-entities-may-be-identified-by-their-mr-imaging-radiophenotype
#7
V C Keil, M Warmuth-Metz, C Reh, S J Enkirch, C Reinert, D Beier, D T W Jones, T Pietsch, H H Schild, E Hattingen, P Hau
BACKGROUND AND PURPOSE: The occurrence of medulloblastomas in adults is rare; nevertheless, these tumors can be subdivided into genetic and histologic entities each having distinct prognoses. This study aimed to identify MR imaging biomarkers to classify these entities and to uncover differences in MR imaging biomarkers identified in pediatric medulloblastomas. MATERIALS AND METHODS: Eligible preoperative MRIs from 28 patients (11 women; 22-53 years of age) of the Multicenter Pilot-study for the Therapy of Medulloblastoma of Adults (NOA-7) cohort were assessed by 3 experienced neuroradiologists...
August 10, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28794084/mechanically-induced-ectopy-via-stretch-activated-cation-nonselective-channels-is-caused-by-local-tissue-deformation-and-results-in-ventricular-fibrillation-if-triggered-on-the-repolarization-wave-edge-commotio-cordis
#8
T Alexander Quinn, Honghua Jin, Peter Lee, Peter Kohl
BACKGROUND: External chest impacts (commotio cordis) can cause mechanically induced premature ventricular excitation (PVEM) and, rarely, ventricular fibrillation (VF). Because block of stretch-sensitive ATP-inactivated potassium channels curtailed VF occurrence in a porcine model of commotio cordis, VF has been suggested to arise from abnormal repolarization caused by stretch activation of potassium channels. Alternatively, VF could result from abnormal excitation by PVEM, overlapping with normal repolarization-related electric heterogeneity...
August 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28790218/-an-extracranial-aneurysm-in-the-distal-posterior-inferior-cerebellar-artery-located-at-the-tonsillomedullary-segment-case-report-and-review-of-the-literature
#9
Nao Shimooka, Shigenori Taketsuna, Shiromaru Ishida, Kensaku Senda, Masato Kawai
We report a rare case of subarachnoid hemorrhage(SAH)due to ruptured extracranial aneurysm originating at the caudal loop of the left posterior inferior cerebellar artery(PICA). A 50-year-old woman presented with severe headache and mild consciousness disturbance. Computed tomography(CT)revealed SAH and intraventricular hemorrhage. Vertebral angiography showed an extracranial aneurysm located on the tonsillomedullary segment of the left PICA. During the surgery, no vessel branches were confirmed near the aneurysm, and the aneurysm was successfully clipped through suboccipital craniotomy with C1 laminectomy...
August 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28790215/-a-case-of-ruptured-distal-anterior-choroidal-artery-aneurysm-associated-with-a-twig-like-middle-cerebral-artery-treated-with-single-stage-aneurysm-clipping-and-sta-mca-double-anastomoses-in-the-acute-phase
#10
Toshimoto Seno, Kanehisa Kohno, Hideo Tanaka, Shinji Iwata, Shinya Fukumoto, Haruhisa Ichikawa, Noriyuki Fumoto, Akihiro Inoue, Saya Ozaki, Yawara Nakamura, Shohei Kohno, Shiro Ohue
We report the case of a patient who has progressed well over 5 years following single-stage aneurysm clipping and superficial temporal artery-middle cerebral artery(STA-MCA)double anastomoses in the acute phase, for a ruptured distal anterior choroidal artery(AChA)aneurysm accompanied by a twig-like MCA. The patient was a 49-year-old female who developed a sudden severe headache and disturbance of consciousness due to subarachnoid hemorrhage and intraventricular hemorrhage(IVH). Cerebral angiography showed a right twig-like MCA associated with an abnormal vascular network and a ruptured aneurysm in the distal AChA...
August 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28781856/endoscopic-third-ventriculostomy-for-hydrocephalus-in-a-patient-with-klippel-feil-syndrome-a-case-report
#11
Tomohisa Ishida, Takashi Inoue, Miki Fujimura, Yoshiteru Shimoda, Masayuki Ezura, Hiroshi Uenohara, Teiji Tominaga
A patient with Klippel-Feil syndrome presented with hydrocephalus secondary to intraventricular hemorrhage. Fusion of the cervical vertebrae may have impeded cerebrospinal fluid flow. Change in the properties of cerebrospinal fluid flow after hemorrhage may have induced noncommunicating hydrocephalus. Endoscopic third ventriculostomy was effective for the treatment of hydrocephalus associated with Klippel-Feil syndrome.
August 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28780838/-retrospective-analysis-of-the-discharge-outcome-of-external-ventricular-drainage-and-conservative-treatment-in-patients-with-severe-intraventricular-hemorrhage
#12
Y F Liu, H C Qiu, G F Zhao, J L Yang, G L Lü, J Lü, W M Kang, B Yan, J Liu, S M Zhao, W J Jiang
Objective: To investigate the discharge outcome of external ventricular drainage(EVD) and conservative treatment in patients with severe intraventricular hemorrhage (SeIVH). Methods: From January 2011 to December 2016, patients with SeIVH admitted to the General Hospital of the PLA Rocket Force and the Army General Hospital received EVD treatment and were classified as the treatment group. According to intraventricular hemorrhage volume and age, patients received conservative treatment were pair matched and classified as control group...
August 1, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28780784/comparison-between-3-dimensional-cranial-ultrasonography-and-conventional-2-dimensional-cranial-ultrasonography-in-neonates-impact-on-reinterpretation
#13
Yu Jin Kim, Young Hun Choi, Hyun Hae Cho, So Mi Lee, Ji Eun Park, Jung-Eun Cheon, Woo Sun Kim, In-One Kim
Purpose: The aim of this study was to evaluate impact of 3-dimensional cranial ultrasonography (3DUS) on reinterpretation of cranial ultrasonography images in neonates in comparison with 2-dimensional cranial ultrasonography (2DUS). Methods: We retrospectively enrolled 50 consecutive young infants who simultaneously underwent both 2DUS and 3DUS scanning from February to March 2015. Two pediatric radiologists independently reviewed both scans for overall image quality on a 5-point scale...
May 28, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28767885/symptomatic-exercise-induced-intraventricular-gradient-in-competitive-athlete
#14
Helder Dores, Lígia Mendes, António Ferreira, Jose Ferreira Santos
No abstract text is available yet for this article.
July 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28767605/a-case-report-of-intraventricular-tigecycline-therapy-for-intracranial-infection-with-extremely-drug-resistant-acinetobacter-baumannii
#15
Yu-Qing Fang, Ru-Cai Zhan, Wei Jia, Bao-Qing Zhang, Jian-Jun Wang
RATIONALE: Intracranial infection with Acinetobacter baumannii is a tough problem due to the presence of multiresistance and drugs poor penetration through the blood brain barrier (BBB). Tigecycline is effective to cure A baumannii, but it can only be used intravenously which is also difficult to pass BBB. So, it will be a breakthrough if intraventricular (IVT) tigecycline is used in the clinical therapy. However, this treatment has been reported quite rarely until now. PATIENT CONCERNS: We described a case of a 50-year-old male worker whose clinical futures were high fever and cerebral rigidity after neurosurgery...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28767132/antenatal-corticosteroid-prophylaxis-in-singleton-and-multiple-pregnancies
#16
Luigi Gagliardi, Renato Lucchini, Roberto Bellù, Rinaldo Zanini
BACKGROUND: The effects of antenatal corticosteroids (ANS) in multiple pregnancies are disputed. In this article, we examined whether estimated effects differ in singletons and multiples and in small for gestational age (SGA) preterm infants. METHODS: We studied 17 073 singletons (81% treated with ANS) and 8274 multiples (86% treated) born at 24-33 weeks from the Italian Neonatal Network (2005-2013). We used Poisson regression models with robust variance to estimate adjusted risk ratios (RR) of in-hospital death, severe intraventricular haemorrhage (IVH), periventricular leukomalacia (PVL), and the composite outcome of severe IVH and death...
August 2, 2017: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/28766173/clinical-features-and-long-term-outcomes-of-pediatric-intraventricular-meningiomas-data-from-a-single-neurosurgical-center
#17
Zhicen Li, Hao Li, Yuming Jiao, Ji Ma, Shuo Wang, Yong Cao, Jizong Zhao
The purpose of this study is to investigate the clinical characteristics and long-term outcomes of pediatric patients with intraventricular meningioma. We retrospectively analyzed a total of 30 pediatric patients with intraventricular meningiomas who were surgically treated at our department between January 2005 and June 2016 and analyzed their clinical characteristics and surgical outcomes. Among the 160 pediatric patients with intracranial meningioma, 33 (20.6%) had intraventricular lesions. However, only 30 patients had complete demographic and clinical data...
August 2, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28762918/-noninvasive-electrophysiological-mapping-in-patients-with-complete-left-bundle-branch-block-and-different-modes-of-biventricular-pacing
#18
S V Zubarev, M P Chmelevsky, M A Budanova, M A Trukshina, T A Lyubimtseva, V K Lebedeva, D S Lebedev
OBJECTIVE: to investigate possibilities of noninvasive electrophysiological mapping (NEM) during biventricular (BiV) pacing and to compare the results with data of 12 lead ECG and tissue Doppler echocardiography (TDI). MATERIAL AND METHODS: The study included 25 patients with complete left bundle branch block (LBBB) and implanted cardiac resynchronization therapy (CRT) system. Twenty-two patients were CRT responders, three other patients did not demonstrate a clear effect...
May 2017: Kardiologiia
https://www.readbyqxmd.com/read/28761549/intraventricular-hemorrhage-a-catastrophic-complication-after-removal-of-old-ventriculoperitoneal-shunt
#19
Manish Singh, Sudheer Kumar Gundamaneni, Gopalakrishnan Madhavan Sasidharan, Venkatesh Shankar Madhugiri, Roopesh Kumar Vadivel Rathakrishnan
No abstract text is available yet for this article.
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28761542/recurrent-intraventricular-meningioma-with-malignant-transformation
#20
Jasmit Singh, Hrushikesh Kharosekar, Vernon Velho
Benign meningioma undergoing a malignant transformation (to a chondrosarcoma) in intraventricular location is very rare and this is first case report to best of our knowledge. Herein, we report a rare case of malignant transformation of a benign intraventricular meningioma with relevant literature.
July 2017: Asian Journal of Neurosurgery
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